21 Sept 2020

6m operation

In really good sunspot maximums the F2 MUF exceeds 50MHz at times and world wide DX is possible on 6m. Even with a low wire dipole I recall ZS (South African) stations chatting on SSB and Ws (USA) chatting as if they were locals. These days the F2 layer rarely gets that high. Luckily some impressive DX is possible via E layer, especially in the summer months.

I think it is fair to say I "play" at 6m using 10W and a V2000 omni antenna. Serious operators have big towers, big beams and maximum legal power. This extra "station gain" could be worth some 30-40dB. There is little doubt that this will make a difference.

Most Junes, Japan is worked from western Europe on 6m. With weak signal modes this is possible with more modest stations, although big stations are better equipped to work such long paths. Last year some even worked Australia from western Europe on 6m through a combination of propagation modes. It is not for nothing that some call it "the magic band".

Often people leave the band thinking it is just "white noise" outside of the summer months. Even at unusual times and months the band can open, which is why FT8 can be so useful: it works with weaker signals than SSB or CW, activity is concentrated in a few kilohertz, and there are lots of monitors. WSPR would be even better, but the longer TX slots could mean some fleeting openings are missed even though WSPR can detect even weaker signals.


No comments: